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It is an electronic “password” issued post verification by a trusted body known as a certificate authority (CA) to ensure that messages are transferred and received securely over the wire by verified users who are what they claim to be.
Multi-domain SAN/UCC or unified communication certificate is used to host multiple domains with a single certificate on a single IP. The additional domains get listed as subject alternative names or SANs while the base domain gets listed under the common name or CNAME field. Depending on the CA, there is an upper limit to the number of domains that can be included on a single certificate.
Before you can understand the need for an SSL certificate for a Microsoft Exchange Server, it’s useful to look at its features and the nature of the information that is processed by it.
Considering the above features, it becomes evident that we’re dealing with sensitive data including but not limited to PII (personally identifiable information) like names, contact information, email, and organizational data for businesses. Organizations not only use Microsoft Exchange Server to centrally manage, distribute, and store company emails but also to share tasks, schedules, and contact details.
With new applications and features being introduced, there is an even greater security risk as the threat landscape now increases ten-fold. This is where SSL steps in — it authenticates the Exchange server to connecting devices and facilitates an encrypted session between the server and the client to avoid eavesdropping while the data is in transit. Apart from having solutions such as data loss prevention (DLP) software, anti-spam, and advanced antivirus software in place, it’s also imperative to ensure the client and the server communicates over a secure connection using HTTPS.
A UCC SSL certificate, also known as exchange server SSL certificate, enables users to secure multiple domains and multiple hostnames with a single certificate on a single IP. With all the exchange services being encrypted, a malicious user will not be able to sniff the traffic. Comodo UCC certificate, designed exclusively for Microsoft Exchange and Office Communications infrastructures, provides business validated, up to 256-bit encrypted SSL certificates with unlimited server licenses and 24/7 support.
Comodo has also combined the benefits of a UCC SSL certificate with a wildcard SSL certificate that allows you to not just secure multiple domains but also an unlimited number of subdomains all with a single certificate.
“Best” is a term that’s relative to the user’s requirements and business needs:
Once the needs and end goals are outlined, it becomes a simple matter of finding a solution that fits the bill from a wide range of product offerings.
|Differentiator||Comodo Domain Validated UCC SSL Certificate||Comodo Unified Communication SSL Certificate (OV)||Comodo Unified Communication Wildcard SSL Certificate (OV)|
|Type||Domain Validated UCC SSL Does not require verification from the business; therefore, the name of the company is not present in the certificate issued.||Organization Validated UCC SSL It requires customers to complete telephone verification; the name of the business is included in the certificate to add legitimacy.||Organization Validated UCC Wildcard SSL Requires customers to complete telephone verification as well.|
|Support||MS Exchange and OCS environments||MS Exchange and OCS environments||MS Exchange and OCS environments|
|Secure||Multi domains||Multi domains||Multiple domains along with an unlimited number of sub-domains|
|SAN||2 SANs included; with SAN control, one can adjust the domains listed in the certificate.||4 SANs included; with SAN field control, one can adjust the domains covered by the certificate.||2 SANs included; SAN-supported which lets the user adjust the domains covered by the certificate as needed.|
|Encryption Strength||128- to 256-bit strong encryption||128- to 256-bit strong encryption with a 2048-bit signature key||Encryption strength up to 256-bit with a 2048-bit signature key|
|Re-Issuance Policy||Free unlimited re-issuance||Free unlimited re-issuance||Free unlimited re-issuance|
|Speed of Issuance||Issued in less than 10 minutes||1-3 days||1-3 days|
|Browser Compatibility||99.9% web and mobile browser compatibility||Trusted by more than 99.9% of major browsers||Recognized by 99.9% of mobile devices and web-browsers|
|Server License||Free unlimited server licenses||Free unlimited server licenses||Free unlimited server licenses|
|SHOP NOW||SHOP NOW||SHOP NOW|